Can two tasks at once improve Parkinson's symptoms?

This study will test whether doing two physical tasks at the same time or combining a physical task with a thinking task can help people with Parkinson's disease move better, keep their balance, and do daily activities more easily. About 39 participants will do 45-minute exercise sessions twice a week for 6 weeks. The goal is to see which type of dual-task training works best for improving motor symptoms and quality of life.